./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6439b1baef116d71fdff38c675a38b8a29c42257 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:47:06,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:47:06,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:47:06,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:47:06,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:47:06,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:47:06,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:47:06,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:47:06,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:47:06,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:47:06,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:47:06,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:47:06,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:47:06,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:47:06,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:47:06,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:47:06,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:47:06,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:47:06,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:47:06,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:47:06,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:47:06,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:47:06,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:47:06,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:47:06,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:47:06,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:47:06,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:47:06,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:47:06,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:47:06,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:47:06,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:47:06,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:47:06,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:47:06,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:47:06,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:47:06,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:47:06,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:47:06,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:47:06,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:47:06,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:47:06,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:47:06,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2019-11-25 08:47:06,872 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:47:06,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:47:06,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:47:06,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:47:06,873 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:47:06,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:47:06,874 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:47:06,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:47:06,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:47:06,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:47:06,876 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:47:06,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:47:06,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:47:06,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:47:06,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:47:06,879 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6439b1baef116d71fdff38c675a38b8a29c42257 [2019-11-25 08:47:07,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:47:07,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:47:07,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:47:07,046 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:47:07,046 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:47:07,047 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/../../sv-benchmarks/c/list-properties/list-2.i [2019-11-25 08:47:07,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/data/6cf4fbcf5/2d21cfc03b2b4321975afed80a7e0cce/FLAGbe6e23184 [2019-11-25 08:47:07,589 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:47:07,590 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/sv-benchmarks/c/list-properties/list-2.i [2019-11-25 08:47:07,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/data/6cf4fbcf5/2d21cfc03b2b4321975afed80a7e0cce/FLAGbe6e23184 [2019-11-25 08:47:08,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/data/6cf4fbcf5/2d21cfc03b2b4321975afed80a7e0cce [2019-11-25 08:47:08,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:47:08,076 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:47:08,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:08,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:47:08,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:47:08,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312a9843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08, skipping insertion in model container [2019-11-25 08:47:08,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:47:08,136 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:47:08,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:08,501 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:47:08,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:08,600 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:47:08,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08 WrapperNode [2019-11-25 08:47:08,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:08,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:47:08,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:47:08,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:47:08,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... [2019-11-25 08:47:08,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:47:08,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:47:08,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:47:08,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:47:08,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:47:08,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:47:08,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:47:08,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:47:08,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:47:08,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:47:08,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:47:08,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:47:08,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:47:08,745 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-25 08:47:08,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:47:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:47:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:47:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:47:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:47:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:47:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:47:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:47:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:47:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:47:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:47:08,750 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:47:08,751 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:47:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:47:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:47:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:47:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:47:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:47:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:47:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:47:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:47:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:47:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:47:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:47:08,759 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:47:08,760 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:47:08,761 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:47:08,762 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:47:08,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:47:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:47:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:47:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:47:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:47:08,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:47:09,087 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-25 08:47:09,401 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:47:09,401 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:47:09,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:09 BoogieIcfgContainer [2019-11-25 08:47:09,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:47:09,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:47:09,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:47:09,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:47:09,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:47:08" (1/3) ... [2019-11-25 08:47:09,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4084407f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:47:09, skipping insertion in model container [2019-11-25 08:47:09,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:08" (2/3) ... [2019-11-25 08:47:09,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4084407f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:47:09, skipping insertion in model container [2019-11-25 08:47:09,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:09" (3/3) ... [2019-11-25 08:47:09,415 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2019-11-25 08:47:09,426 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:47:09,434 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-25 08:47:09,444 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-25 08:47:09,467 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:47:09,468 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:47:09,468 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:47:09,468 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:47:09,468 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:47:09,468 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:47:09,468 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:47:09,469 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:47:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2019-11-25 08:47:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:47:09,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:09,502 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:09,503 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1586773019, now seen corresponding path program 1 times [2019-11-25 08:47:09,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:09,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [129387965] [2019-11-25 08:47:09,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:09,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:09,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:09,800 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:47:09,800 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:09,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:09,808 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:09,808 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:47:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,830 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:09,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [129387965] [2019-11-25 08:47:09,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:09,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:47:09,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409025723] [2019-11-25 08:47:09,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:47:09,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:47:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:47:09,866 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2019-11-25 08:47:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:10,162 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-25 08:47:10,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:47:10,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-25 08:47:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:10,172 INFO L225 Difference]: With dead ends: 75 [2019-11-25 08:47:10,172 INFO L226 Difference]: Without dead ends: 66 [2019-11-25 08:47:10,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:47:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-25 08:47:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-11-25 08:47:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-25 08:47:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-11-25 08:47:10,210 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 10 [2019-11-25 08:47:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:10,211 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-11-25 08:47:10,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:47:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-11-25 08:47:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:47:10,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:10,212 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:10,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:10,414 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:10,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1586773020, now seen corresponding path program 1 times [2019-11-25 08:47:10,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:10,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1677129139] [2019-11-25 08:47:10,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:10,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:10,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:10,624 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:47:10,624 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:10,631 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:10,632 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:10,632 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:47:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,658 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:10,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677129139] [2019-11-25 08:47:10,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:10,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:47:10,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343232585] [2019-11-25 08:47:10,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:47:10,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:47:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:47:10,783 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2019-11-25 08:47:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:11,239 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2019-11-25 08:47:11,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:47:11,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-25 08:47:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:11,242 INFO L225 Difference]: With dead ends: 83 [2019-11-25 08:47:11,242 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:47:11,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:47:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2019-11-25 08:47:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-25 08:47:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-25 08:47:11,256 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 10 [2019-11-25 08:47:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:11,257 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-25 08:47:11,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:47:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-25 08:47:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:47:11,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:11,260 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:11,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:11,464 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1904496915, now seen corresponding path program 1 times [2019-11-25 08:47:11,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:11,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [639316526] [2019-11-25 08:47:11,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:11,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:47:11,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:11,744 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-25 08:47:11,744 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:11,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:11,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:11,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-25 08:47:11,802 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-25 08:47:11,803 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:11,811 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:11,811 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:11,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-25 08:47:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,838 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:11,913 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-25 08:47:11,913 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-25 08:47:11,921 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:11,922 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-25 08:47:11,922 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-25 08:47:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:11,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639316526] [2019-11-25 08:47:11,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:11,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-25 08:47:11,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846595461] [2019-11-25 08:47:11,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:47:11,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:47:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:47:11,958 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 11 states. [2019-11-25 08:47:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:12,829 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2019-11-25 08:47:12,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:47:12,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-25 08:47:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:12,831 INFO L225 Difference]: With dead ends: 145 [2019-11-25 08:47:12,831 INFO L226 Difference]: Without dead ends: 145 [2019-11-25 08:47:12,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:47:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-25 08:47:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 80. [2019-11-25 08:47:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-25 08:47:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2019-11-25 08:47:12,841 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 17 [2019-11-25 08:47:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:12,841 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2019-11-25 08:47:12,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:47:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2019-11-25 08:47:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:47:12,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:12,843 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:13,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:13,051 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 639476165, now seen corresponding path program 1 times [2019-11-25 08:47:13,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:13,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [267582263] [2019-11-25 08:47:13,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:13,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:13,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:13,271 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:13,272 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-25 08:47:13,273 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:13,302 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-25 08:47:13,303 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:13,303 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-25 08:47:13,326 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:13,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:13,346 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:13,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:13,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-25 08:47:13,370 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-25 08:47:13,371 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:13,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:13,376 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:47:13,376 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2019-11-25 08:47:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:13,394 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:13,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267582263] [2019-11-25 08:47:13,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:13,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-25 08:47:13,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105630420] [2019-11-25 08:47:13,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:47:13,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:47:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:13,424 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 8 states. [2019-11-25 08:47:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:14,058 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2019-11-25 08:47:14,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:47:14,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-25 08:47:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:14,060 INFO L225 Difference]: With dead ends: 102 [2019-11-25 08:47:14,060 INFO L226 Difference]: Without dead ends: 102 [2019-11-25 08:47:14,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-25 08:47:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-11-25 08:47:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-25 08:47:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2019-11-25 08:47:14,073 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 17 [2019-11-25 08:47:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:14,074 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2019-11-25 08:47:14,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:47:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2019-11-25 08:47:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:47:14,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:14,076 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:14,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:14,279 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash 639476166, now seen corresponding path program 1 times [2019-11-25 08:47:14,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:14,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [658194223] [2019-11-25 08:47:14,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:14,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:47:14,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:14,467 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:47:14,467 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,472 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:14,472 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,472 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:47:14,487 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:14,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:14,510 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:14,510 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,519 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:14,520 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,520 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-25 08:47:14,555 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-25 08:47:14,555 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,568 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:14,572 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-25 08:47:14,572 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,579 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:14,579 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:14,580 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2019-11-25 08:47:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:14,605 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:14,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [658194223] [2019-11-25 08:47:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:47:14,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030932840] [2019-11-25 08:47:14,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:47:14,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:47:14,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:14,800 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 10 states. [2019-11-25 08:47:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:15,875 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-11-25 08:47:15,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:47:15,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-25 08:47:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:15,877 INFO L225 Difference]: With dead ends: 103 [2019-11-25 08:47:15,877 INFO L226 Difference]: Without dead ends: 103 [2019-11-25 08:47:15,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:47:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-25 08:47:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2019-11-25 08:47:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-25 08:47:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-11-25 08:47:15,884 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 17 [2019-11-25 08:47:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:15,884 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-11-25 08:47:15,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:47:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-11-25 08:47:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:47:15,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:15,885 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:16,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:16,088 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1771797442, now seen corresponding path program 1 times [2019-11-25 08:47:16,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:16,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1981089655] [2019-11-25 08:47:16,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:16,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:16,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:16,252 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:16,252 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-25 08:47:16,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:16,273 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-25 08:47:16,274 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:16,274 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-25 08:47:16,288 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:16,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:16,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:16,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:16,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-25 08:47:16,326 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-25 08:47:16,327 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:16,332 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:16,332 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:47:16,333 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:13 [2019-11-25 08:47:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:16,346 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:16,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981089655] [2019-11-25 08:47:16,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:16,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-25 08:47:16,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191954030] [2019-11-25 08:47:16,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:47:16,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:47:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:16,369 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 8 states. [2019-11-25 08:47:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:16,698 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-11-25 08:47:16,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:47:16,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-25 08:47:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:16,699 INFO L225 Difference]: With dead ends: 96 [2019-11-25 08:47:16,699 INFO L226 Difference]: Without dead ends: 96 [2019-11-25 08:47:16,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-25 08:47:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2019-11-25 08:47:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-25 08:47:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-25 08:47:16,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 18 [2019-11-25 08:47:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:16,706 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-25 08:47:16,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:47:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-25 08:47:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:47:16,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:16,707 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:16,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:16,909 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1771797443, now seen corresponding path program 1 times [2019-11-25 08:47:16,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:16,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2050869789] [2019-11-25 08:47:16,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:17,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:47:17,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:17,088 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-25 08:47:17,088 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,092 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:17,093 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,093 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:47:17,118 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:17,118 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,129 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:17,133 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-25 08:47:17,133 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,150 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:17,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,151 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-25 08:47:17,172 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-25 08:47:17,172 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,181 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:17,183 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-25 08:47:17,184 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,188 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:17,188 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:17,189 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:9 [2019-11-25 08:47:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:17,211 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:17,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050869789] [2019-11-25 08:47:17,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:17,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:47:17,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977671709] [2019-11-25 08:47:17,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:47:17,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:47:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:47:17,419 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 10 states. [2019-11-25 08:47:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:18,414 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-11-25 08:47:18,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:47:18,416 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-25 08:47:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:18,417 INFO L225 Difference]: With dead ends: 94 [2019-11-25 08:47:18,417 INFO L226 Difference]: Without dead ends: 94 [2019-11-25 08:47:18,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:47:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-25 08:47:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2019-11-25 08:47:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-25 08:47:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-25 08:47:18,422 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 18 [2019-11-25 08:47:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:18,423 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-25 08:47:18,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:47:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-25 08:47:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:47:18,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:18,424 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:18,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:18,632 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -613044742, now seen corresponding path program 1 times [2019-11-25 08:47:18,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:18,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [865152952] [2019-11-25 08:47:18,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:18,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:47:18,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:18,832 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-25 08:47:18,832 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:18,841 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:18,841 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:18,841 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-25 08:47:18,878 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-25 08:47:18,878 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:47:18,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:18,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:47:18,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-25 08:47:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:18,891 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:47:18,945 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-25 08:47:18,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-25 08:47:18,952 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:47:18,952 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-25 08:47:18,952 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-25 08:47:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:18,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865152952] [2019-11-25 08:47:18,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:18,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-25 08:47:18,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728299579] [2019-11-25 08:47:18,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:47:18,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:47:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:47:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:47:18,977 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 11 states. [2019-11-25 08:47:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:19,590 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-11-25 08:47:19,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:47:19,591 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-25 08:47:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:47:19,592 INFO L225 Difference]: With dead ends: 126 [2019-11-25 08:47:19,592 INFO L226 Difference]: Without dead ends: 126 [2019-11-25 08:47:19,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:47:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-25 08:47:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2019-11-25 08:47:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:47:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-25 08:47:19,598 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 19 [2019-11-25 08:47:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:47:19,598 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-25 08:47:19,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:47:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-25 08:47:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:47:19,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:47:19,599 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:19,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:19,800 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-25 08:47:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1826142898, now seen corresponding path program 1 times [2019-11-25 08:47:19,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:47:19,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [838652628] [2019-11-25 08:47:19,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:20,093 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:47:20,093 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:47:20,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:47:20,305 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-25 08:47:20,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:47:20 BoogieIcfgContainer [2019-11-25 08:47:20,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:47:20,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:47:20,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:47:20,326 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:47:20,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:09" (3/4) ... [2019-11-25 08:47:20,329 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:47:20,338 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-25 08:47:20,393 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6c60d662-1fc7-4ace-badc-fccf25584589/bin/uautomizer/witness.graphml [2019-11-25 08:47:20,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:47:20,397 INFO L168 Benchmark]: Toolchain (without parser) took 12318.97 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 269.5 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -211.6 MB). Peak memory consumption was 57.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,398 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:47:20,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 524.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,398 INFO L168 Benchmark]: Boogie Preprocessor took 73.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,399 INFO L168 Benchmark]: RCFGBuilder took 726.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.3 MB). Peak memory consumption was 59.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,399 INFO L168 Benchmark]: TraceAbstraction took 10921.59 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 122.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -94.6 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,399 INFO L168 Benchmark]: Witness Printer took 68.53 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:47:20,404 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 524.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -180.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 726.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.3 MB). Peak memory consumption was 59.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10921.59 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 122.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -94.6 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. * Witness Printer took 68.53 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 520]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L522] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L523] List t; [L524] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L540] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L541] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L545] COND FALSE !(p->h != 3) [L547] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 25 error locations. Result: UNSAFE, OverallTime: 10.8s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 321 SDtfs, 952 SDslu, 1077 SDs, 0 SdLazy, 1477 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 225 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 18076 SizeOfPredicates, 64 NumberOfNonLiveVariables, 520 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 20/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...